All the preparations for the task and we’re ready to start. A. completeB. have completed

问题补充：

All the preparations for the task , and we’re ready to start.

A. complete

B. have completed

C. had been completed

D. have been completed

答案：

A. complete

B. have completed

C. had been completed

(答案→)D. have been completed

解析：句意：所有的任务的准备工作都完成了，我们准备开始了。从we’re ready to start.可知现在准备开始，那么准备是已经完成，而且preparations和complete是被动关系，所以用现在分词的被动，所以选D。